Fal 'Chavamee, a Sangheili Arbiter and leader of the 'Chavam clan on Sanghelios four centuries before the Human-Covenant War, held the rank as the Covenant's highest religious honor for seasoned veterans. He enjoyed privilege within the Covenant and commanded military training operations on Sanghelios.

Growing disillusioned with Covenant leadership, Fal believed his people had forsaken traditional honor for power. He openly rejected the Covenant's Great Journey doctrine, declaring it a lie. This heresy prompted the Prophets to send forces to eliminate him. Fal confronted and defeated an entire Covenant contingent single-handedly, cutting through Sangheili infantry and Kig-Yar, destroying Ghost and Wraith vehicles, and killing three Mgalekgolo with precise energy sword strikes to their vulnerable areas.

Haka, a member of Fal's clan, exploited his heresy. With Prophet backing, Haka coerced Fal's close friend Roh into murdering Fal's wife, Han, leaving her body at their home as a challenge. Haka then killed Roh. Discovering their bodies, Fal was consumed by grief and rage. He accepted Haka's challenge, fighting through an entire Covenant battalion to reach his foe.

Their final confrontation erupted atop a Forerunner structure. After a tense period of tactical circling, Fal and Haka clashed in a brief, lethal duel. Fal sustained a catastrophic slash across his torso while simultaneously driving his blade through Haka's midsection. Haka died first; Fal perished moments later, his final thoughts fixed on his wife.

Fal's defiance fundamentally reshaped the Arbiter's role. Once a symbol of honor and prestige, his heresy led the Prophets to redefine the rank as a mark of disgrace, assigned to disgraced Sangheili for suicidal missions to regain lost honor, transforming it into a symbol of martyrdom within the Covenant. Centuries later, his story was reinterpreted as a cautionary tale about vengeance's destructiveness and the potential for reconciliation between former enemies.